/Engine/Source/Runtime/Engine/Classes/Engine/StaticMesh.h
Builds static mesh LODs from the array of StaticMeshDescriptions passed in
void BuildFromStaticMeshDescriptions ( const [TArray](API\Runtime\Core\Containers\TArray)< [UStaticMeshDescription](API\Runtime\StaticMeshDescription\UStaticMeshDescription) * > & StaticMeshDescriptions, bool bBuildSimpleCollision, bool bFastBuild )